(CommandList
  children: [
    (C {(_Dbg_help_add)} {(watch)} 
      {(SQ <'watch [ARITH?] EXP\n'> <'\n'> <'Set or clear a watch expression.'>)}
    )
    (C {(_Dbg_alias_add)} {(W)} {(watch)})
    (FuncDef
      name: _Dbg_do_watch
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_Typeset
              flags: [-a]
              pairs: [(assign_pair lhs:(LhsName name:a) op:Equal spids:[91])]
              spids: [87]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:a)
                  op: Equal
                  rhs: {(ArrayLiteralPart words:[{($ VSub_Name '$_Dbg_args')}])}
                  spids: [94]
                )
              ]
              spids: [94]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [
                (assign_pair
                  lhs: (LhsName name:first)
                  op: Equal
                  rhs: 
                    {
                      (BracedVarSub
                        token: <VSub_Name a>
                        bracket_op: (ArrayIndex expr:(ArithWord w:{(Lit_Digits 0)}))
                        spids: [103 108]
                      )
                    }
                  spids: [102]
                )
              ]
              spids: [100]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: (BoolBinary op_id:BoolBinary_GlobDEqual left:{($ VSub_Name '$first')} right:{(SQ )})
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [(C {(_Dbg_do_watch_internal)} {(0)})]
                  spids: [16777215 126]
                )
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (Pipeline
                          children: [(C {(_Dbg_defined)} {(DQ ($ VSub_Name '$first'))})]
                          negated: True
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(_Dbg_errmsg)} 
                      {(DQ ("Can't set watch: no such variable ") ($ VSub_Name '$first') (.))}
                    )
                  ]
                  spids: [134 146]
                )
              ]
              else_action: [
                (C {(unset)} {(a)} {(first)})
                (C {(_Dbg_do_watch_internal)} {(0)} 
                  {
                    (DQ (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) ($ VSub_Name '$_Dbg_args'))
                  }
                )
              ]
              spids: [158 178]
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{($ VSub_QMark '$?')})
          ]
          spids: [84]
        )
      spids: [80 83]
    )
    (C {(_Dbg_help_add)} {(watche)} {(SQ <'watche [EXP] -- Set or clear a watch expression.'>)})
    (C {(_Dbg_alias_add)} {(We)})
    (FuncDef
      name: _Dbg_do_watche
      body: 
        (BraceGroup
          children: [
            (C {(_Dbg_do_watch_internal)} {(1)} {(DQ ($ VSub_Name '$_Dbg_args'))})
            (ControlFlow token:<ControlFlow_Return return> arg_word:{($ VSub_QMark '$?')})
          ]
          spids: [208]
        )
      spids: [204 207]
    )
    (FuncDef
      name: _Dbg_do_watch_internal
      body: 
        (BraceGroup
          children: [
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: (C {(Lit_Other '[')} {(-z)} {(DQ ($ VSub_Number '$2'))} {(Lit_Other ']')})
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [(C {(_Dbg_clear_watch)})]
                  spids: [16777215 250]
                )
              ]
              else_action: [
                (Assignment
                  keyword: Assign_Typeset
                  flags: [-i]
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:n)
                      op: Equal
                      rhs: {(_Dbg_watch_max) (Lit_Other '+') (Lit_Other '+')}
                      spids: [265]
                    )
                  ]
                  spids: [261]
                )
                (C 
                  {(_Dbg_watch_arith) (Lit_Other '[') ($ VSub_Name '$n') (Lit_Other ']') 
                    (Lit_Other '=') (DQ ($ VSub_Number '$1'))
                  }
                )
                (C {(shift)})
                (C 
                  {(_Dbg_watch_exp) (Lit_Other '[') ($ VSub_Name '$n') (Lit_Other ']') (Lit_Other '=') 
                    (DQ ($ VSub_Number '$1'))
                  }
                )
                (C 
                  {(_Dbg_watch_val) (Lit_Other '[') ($ VSub_Name '$n') (Lit_Other ']') (Lit_Other '=') 
                    (CommandSubPart
                      command_list: 
                        (CommandList
                          children: [(C {(_Dbg_get_watch_exp_eval)} {($ VSub_Name '$n')})]
                        )
                      left_token: <Left_CommandSub '$('>
                      spids: [299 303]
                    )
                  }
                )
                (C 
                  {(_Dbg_watch_enable) (Lit_Other '[') ($ VSub_Name '$n') (Lit_Other ']') 
                    (Lit_Other '=') (1)
                  }
                )
                (C 
                  {(_Dbg_watch_count) (Lit_Other '[') ($ VSub_Name '$n') (Lit_Other ']') 
                    (Lit_Other '=') (0)
                  }
                )
                (C {(_Dbg_printf)} {(SQ <'%2d: %s==%s arith: %d'>)} {($ VSub_Name '$n')} 
                  {
                    (DQ ('(') 
                      (BracedVarSub
                        token: <VSub_Name _Dbg_watch_exp>
                        bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$n')}))
                        spids: [334 339]
                      ) (')')
                    )
                  } 
                  {
                    (BracedVarSub
                      token: <VSub_Name _Dbg_watch_val>
                      bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$n')}))
                      spids: [343 348]
                    )
                  } 
                  {
                    (BracedVarSub
                      token: <VSub_Name _Dbg_watch_arith>
                      bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$n')}))
                      spids: [352 357]
                    )
                  }
                )
              ]
              spids: [257 360]
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
          ]
          spids: [234]
        )
      spids: [230 233]
    )
  ]
)